LIF negatively regulates tumour-suppressor p53 through Stat3/ID1/MDM2 in colorectal cancers.

Published online

Journal Article

Leukaemia inhibitory factor (LIF) has been recently identified as a p53 target gene, which mediates the role of p53 in maternal implantation under normal physiological conditions. Here we report that LIF is a negative regulator of p53; LIF downregulates p53 protein levels and function in human colorectal cancer (CRC) cells. The downregulation of p53 by LIF is mediated by the activation of Stat3, which transcriptionally induces inhibitor of DNA-binding 1 (ID1). ID1 upregulates MDM2, a key negative regulator of p53, and promotes p53 protein degradation. LIF is overexpressed in a large percentage of CRCs. LIF overexpression promotes cellular resistance towards chemotherapeutic agents in cultured CRC cells and colorectal xenograft tumours in a largely p53-dependent manner. Overexpression of LIF is associated with a poor prognosis in CRC patients. Taken together, LIF is a novel negative regulator of p53, overexpression of LIF is an important mechanism for the attenuation of p53, which promotes chemoresistance in CRCs.

Full Text

Duke Authors

Cited Authors

  • Yu, H; Yue, X; Zhao, Y; Li, X; Wu, L; Zhang, C; Liu, Z; Lin, K; Xu-Monette, ZY; Young, KH; Liu, J; Shen, Z; Feng, Z; Hu, W

Published Date

  • October 17, 2014

Published In

Volume / Issue

  • 5 /

Start / End Page

  • 5218 -

PubMed ID

  • 25323535

Pubmed Central ID

  • 25323535

Electronic International Standard Serial Number (EISSN)

  • 2041-1723

Digital Object Identifier (DOI)

  • 10.1038/ncomms6218

Language

  • eng

Conference Location

  • England